Z8F041APH020SG2156 ZiLOG, Z8F041APH020SG2156 Datasheet - Page 135

• Manufacturer Part Number: Z8F041APH020SG2156
• Description: 8-bit Microcontrollers - MCU 4K FLASH 1K RAM 128B NVDS
• Manufacturer: ZiLOG

Specifications of Z8F041APH020SG2156

• Rohs: yes
• Core: eZ8
• Processor Series: Z8F041xx
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 4 KB
• Data Ram Size: 1 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.7 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: PDIP-20
• Mounting Style: Through Hole
• A/d Bit Size: 10 bit
• A/d Channels Available: 8
• Interface Type: UART
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Program Memory Type: Flash
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V

PS022827-1212
Acceptable
Rate (kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
3.579545 MHz System Clock
10.0 MHz System Clock
BRG Divisor
The UART data rate is calculated using the following equation:
For a given UART data rate, calculate the integer baud rate divisor value using the follow-
ing equation:
The baud rate error relative to the acceptable baud rate is calculated using the following
equation:
For reliable communication, the UART baud rate error must never exceed 5 percent.
Table 72 provides information about the data rate errors for popular baud rates and com-
monly used crystal oscillator frequencies.
(Decimal)
UART Baud Rate (bits/s)
UART Baud Rate Divisor Value (BRG)
UART Baud Rate Error (%)
1042
2083
N/A
130
260
521
16
33
65
11
1
3
5
Actual Rate
208.33
625.0
125.0
(kHz)
56.8
39.1
18.9
9.62
4.81
2.40
1.20
0.60
0.30
N/A
Table 72. UART Baud Rates
=
P R E L I M I N A R Y
–16.67
Error
–1.36
–0.03
–0.03
–0.03
0.00
8.51
1.73
0.16
0.16
0.16
----------------------------------------------------------------------------------------------- -
16
=
N/A
(%)
0.2
100
System Clock Frequency (Hz)

UART Baud Rate Divisor Value



Actual Data Rate Desired Data Rate
--------------------------------------------------------------------------------------------------- -
Acceptable
=
Rate (kHz)
1250.0
Round
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
Desired Data Rate


5.5296 MHz System Clock
1.8432 MHz System Clock
System Clock Frequency (Hz)
------------------------------------------------------------------------------ -
16
BRG Divisor

(Decimal)
Z8 Encore! XP
UART Control Register Definitions
UART Data Rate (bits/s)
–
1152
N/A
N/A
144
288
576
18
36
72
1
3
6
9
Product Specification
Actual Rate
(kHz)
345.6
115.2
®
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
N/A
N/A
F082A Series




38.24
Error
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
N/A
N/A
(%)
118